Real or semi-real technology

The producers of Stargate SG-1 and Stargate Atlantis collaborated closely with the United States Air Force. The USAF is portrayed in a positive light in the series; as a result the franchise received access to USAF weaponry and fighter jets. The Oregon Air National Guard 173rd FW from Kingsley Field in Klamath Falls, OR provided F-15 fighter jets for the movie Stargate: Continuum. The FN P90 was the favoured weapon of SG-1, and replaced the Heckler & Koch MP5 that was used until season 4 of Stargate SG-1. The P90 is also used by teams on Stargate Atlantis.
In seasons 9 and 10 of SG1, the teams can be seen using other firearms, including the G36 and MP7. All personnel appear to be issued the Beretta 92, which they used throughout the series.

Technology in Stargate

In the fictional universe of Stargate, a number of technologically advanced races and societies have produced a variety of highly advanced weapons, tools, and spacecraft. By liaising with these races and learning from them, Earth too has begun to create its own futuristic technology. All such technology is SCI-classified top secret, and is used solely by the SGC and its SG teams, or in Atlantis.

Fictional materials and elements

Hoffan drug A drug made by the Hoffans, which prevents the individual from being fed on by the Wraith and has the side effect of killing any Wraith who attempts to do so. It first appears in "Poisoning the Well", where the Atlantis Expedition is made aware of the drug. They quickly discover that the drug's positive benefits come with a 50% chance of death in the subject. The Hoffans distributed it among their population anyway, and the Wraith exterminated them as a result. The drug is later discovered and refined by Michael, reducing the fatality rate to 30%, and distributed to several random planets in Pegasus. To that end, in "Outsiders", it is revealed the Wraith are destroying any civilization associated with the drug so they can feed "indiscriminately" again.